Other than a small minority of agitators, I don't think most people went to a BLM protest with revenge, destruction, and murder on their mind. I mean, the whole point was opposing the murder of unarmed citizens by agents of the state. The slogan was "defund the police", not "hang Mike Pence."

Yes, ~25 Americans were killed last year in connection to these things, but as this article shows, that may be as much about the presence of guns at these things than anything else— here's a pretty solid summary: https://www.theguardian.com/world/2020/oct/31/americans-kill...